Combined cycle power plants that use both gas and steam turbines have much higher efficiencies than traditional steam power plants and are increasingly utilized for both natural gas and biogas based power generation. Gas is burned using high-pressure air to produce a high-temperature, high-pressure gas that is fed into a gas turbine driving a generator. The lower-pressure exhaust gas from the combustion turbine is still at high temperature, so it can be used to produce steam to drive a steam turbine that generates additional power.

This paper illustrates that the dynamic simulation of these turbine systems is not straightforward because of numerical integration and variable specification (free or fixed) issues. An effective control structure for handling the very large hour-to-hour daily disturbances in electric power load is developed. The numerical example is for a low-pressure biogas process, but the turbine simulation procedure is applicable to any combustion turbine process.

同时使用燃气轮机和蒸汽轮机的联合循环发电厂比传统的蒸汽发电厂具有更高的效率，并且越来越多地用于天然气和沼气发电。使用高压空气燃烧气体以产生高温高压气体，该高温高压气体被馈送到驱动发电机的燃气轮机中。来自燃气轮机的低压废气仍处于高温状态，因此可用于产生蒸汽，以驱动产生额外动力的蒸汽轮机。

本文说明，由于数值积分和变量规格（自由或固定）问题，这些涡轮机系统的动态仿真并不简单。提出了一种有效的控制结构，用于处理每天大小时的电力负荷日常干扰。数值示例适用于低压沼气工艺，但涡轮机仿真过程适用于任何燃气轮机工艺。